One of the most frequent disorder of the skin, is an allergy to the flea saliva that is injected into the skin at the time that the fleas take their blood meals. Many dogs though, create antibodies to counter the bites.
Each new flea bite prompts an intense reaction of local irritation and itching.
Sometimes an affected dog will mutilate its own skin by trying to relieve the discomfort. In these instances, a short course of anti-inflammatory cortisone injections or tablets may be indicated to affort your dog temporary relief and allow its skin to heal.
The easiest method to avoid flea bites is to reoutinely use a high quality flea nd tick prevention system.
Such as:
topical solutions - Frontline, Avantage, Advantix, etc.
Monthly tablets - Comfortis, Trifexix, to name a few
There are also many homeopathic ideas that you can find on the web. They include many of your scented oil sprays:
cedar oil, lavender oil, a vinegar wash,